203321320312 has 32 divisors (see below), whose sum is σ = 418374875520. Its totient is φ = 91865369440.

The previous prime is 203321320291. The next prime is 203321320327. The reversal of 203321320312 is 213023123302.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6902878 + ... + 6932269.

It is an arithmetic number, because the mean of its divisors is an integer number (13074214860).

Almost surely, 2^203321320312 is an apocalyptic number.

203321320312 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

203321320312 is an abundant number, since it is smaller than the sum of its proper divisors (215053555208).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

203321320312 is a wasteful number, since it uses less digits than its factorization.

203321320312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13835331 (or 13835327 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 22.

Adding to 203321320312 its reverse (213023123302), we get a palindrome (416344443614).

The spelling of 203321320312 in words is "two hundred three billion, three hundred twenty-one million, three hundred twenty thousand, three hundred twelve".